RO engine thrust limit

[archenemy_6]

I started a RO with RP-0 career a while back and immediately noticed that all the liquid fueled engines would have an abrupt cut off right at about 4.08 TWR. I thought it might be a part of one of the mods I had installed so I usually got around it by making clusters of 5 engines and shutting off 2 at a time. It usually let me use all of the fuel in a stage. 

So yesterday I was playing most of the day when things just started to go wrong. Every simulation I'd run the rocket would take off and slowly drift sideways and then get ripped apart like it was under a lot of aerodynamic stress. After a few reloads my Kerbal construction time upgrades had reset and it showed I had -56 upgrades available. So I decided to reinstall everything.

After I get a new game working I notice that the thrust limit is gone and rockets will accelerate far beyond that limit. 

Is there supposed to be a limit in RO or one of the mods or was I just playing with a broken game the whole time?

[regex]

Broken game.

[NathanKell]

Yep, broken install. Make sure you're on 1.1.2 and you don't have Tweakscale installed.