not exactly. i'm guessing that the 4-ohm load + the limitations of your amp + the 'exuberance' of your playing caused the amp to protect itself, momentarily. the only concern i'd have about your 'way-fun-rig' is the amount of stress on the 2x10 cabinet, especially with a bigger/badder amp. but, i think your amp is telling you, "i'm running out of steam." so if you play the rig within the limits of your current amp = no problems for either cabinet.
mostly
have some fun while you dial back the volume (and your expectations of
that amp) just a little bit!