I agree with all the other comments.
ALSO The SM works for the EC and OC and has to comply with their wishes. They can make no arbitary decisions (unless authorized by a previous motion i.e. to spend up to $xxx without EC or OC approval for repairs).
If the Sec has approved spending without approval from EC or OC then tell him to refund the money to the Strata fund untill a subsequent motion is passed approveing the spending via a vote.
You can threaten him with action at CTTT to revover the money from him (you can use this threat to get him to cancel the EGM).
Also get Sec to organise another EGM (without inviiting the SM) to vote the motions that you wish to be voted.
Get rid of this SM ASAP is the bottom line.