The RNG 110 uses the XMP IR protocol and 10093 is the Sharp IR protocol.  A protocol defines the pattern of on/off flashes of the IR emitter, including the modulation frequency, and the durations of the on burst and of burst.  These two protocols are different of course, but there are similarities.   Both use a modulation frequency of 38KHz (so does 90% of all IR controlled equipment).    XMP uses an on duration of 210 microseconds, while Sharp uses 260 microseconds, which are fairly close to each other.  However, the TV should be easily able to reject XMP signals.

Two suggestions:  
1) Try reducing theIR signal level reaching the TV by covering the TV's IR sensor with e.g. black tape with a small hole in it.  Or try a piece of fabric in front of it.  See if you can find a covering that allows the TV to respond to signals sent using TV mode on the remote, but doesn't respond to cable signals.

2) Perhaps Sharp has fixed this problem with a new release of firmware.  I don't know which model you have, but there is a firmware update available for many new Sharp 60s TVs.  The instructions show how to determine if your TV has the latest firmware, and how to update if necessary.

It makes sense to complain to Sharp.  The TV should not do this, and since there are probably a few million Comcast users who have boxes which use XMP protocol, they may have already heard about (and maybe fixed) this issue.