What's really confusing is that TRPGs (Tactical RPGs, like Final Fantasy Tactics) are called SRPGs in Japan (Simulation RPGs). But in English, SRPG is short for Strategic RPG- a rather niche genre, but it has some games.

That in turn has caused a lot of Steam users to incorrectly tag Tactical RPGs as Strategy RPGs [much like how people who don't know the difference between Team PvP and Co-op like to mistag Team PvP games as being Co-op -.-; (Co-op is Team PvE- multiple players against a non-human opponent, while Team PvP is multiple players against other multiple players). ]

So no worries, people get confused on the specifics pretty regularly (especially given that most people use Steam for gaming these days, and games are regularly mistagged there). It's even more of a mess when you get into trying to pick apart music sub-genres- geesh. :P

If you like FTL, you should check out Convoy and Death Skid Marks, they're both supposed to play very similarly (though I've yet to get copies, so I couldn't say first-hand). (Bounty Train is a bit more of a strategy/trading game, but it's supposed to have some FTL-style elements as well.)
Hand of Fate is also a pretty awesome rogue-lite, it blends dungeon-crawling, CCG collecting, and Batman: Arkham series style combat (with a splash of Dark Souls). It's surprisingly accessible, given its complex blend of elements. :)

But yeah- when you think strategy, think games like the Civilization series or any RTS game, with large scale combat and complicated resource interactions. When you think tactics, think stuff like Final Fantasy Tactics- a single small team on a small battlefield, with no economic/civilization-building/etc elements involved.

I don't think there's a space-based RTWP yet, but the pausing and making tactical decisions element is very similar, so you may enjoy those regardless. Space Sims tend to be really involving, but in many ways they're fairly similar to FTL in general concept (and if your basis for choosing games is based on 'Space' as a theme, then it's definitely the genre you probably want to explore most).
Mech games are a bit similar to Space Sims, in turn, though they're less focused on exploration and freedom of movement, and more on more involved machine building- so in a way, a space sim that loses its exploration in favor of a racing game's depth of car customization. :'P

'course, then you got space sim mech games, which may or may not have the depth of customization that mech games have, but otherwise can really blend the best of both genres- giving you an interesting blend of space flight and mech-based combat. :)

Don't worry about it, that's happened to me too. Glad to hear you received the game, and I hope you have fun with it!