Do you mean
They took it to the EPL. EPL rules demand that disputes between clubs go to conciliation. Everton offered £1m. Watford not satisfied. This is simply the next stage of the process.
For all your jibes of 'tinpot' (yes, we are, and we know, thanks), the worst that can happen to WFC is they will look a bit stupid. The worst that can happen to EFC is a points deduction, or a transfer embargo.
And for info like, Watford did not tap up Silva. He had a relegation break clause in his contract, and Hulls relegation was confirmed before Watford's approach. Do you not think that Hull, with their nutjob owner, would have spoken out if it were otherwise? The fact that Silva tried to justify his own slipperiness by lying to grass up Watford tells you the sort of bloke you've got for a manager.