OK, the two midi documents you attached look perfectly fine to me.
The BIG problem from YOUR point of view is that the MIDI implementation for this device is VERY (as in EXTREMELY) limited. Seems fairly reasonable for a digital piano mind you, then, this is NOT a full-blown Synth. The idea is that everything is already there in the samples, and who do you think YOU are to even think about messing with those??
Joking aside, it's all down to money, and costs, and market size. They've designed a product for a specific market, and they've gone for a price point that they hope will allow them to sell enough to break even. They're clearly not aiming at the knob-twiddlers, there's enough REAL SYNTHs on the market for them.
The extra costs involved of designing all the RAM/ROM, with the published map of all the addresses, and the programming interface (that's in effect what all the SYSEX stuff is) will add TOO MUCH to the cost, therefore the price, when most of the target market will NOT be interested.
Look at the Midi Imp Chart, the single page table which is a summary of what the device will do re MIDI. There is a section re SysEx. Two explicit 'X' for Send and Receive, i.e. Totally NOTHING. This device seems to be 100% SysEx FREE! I suggest you study the controllers, and test them, and see what they can do indiv and in combinations. I suspect that there will be nothing in the box to communicate with, hence any SysEx data will be totally disregarded.
Sorry to be bringing you bad news.
Geoff