Welcome,
ThisCanBeSaidWithOptionalRepetitions is actually not supported by RuleORama (I think this is mentioned in the docs and headers) so it is supposed to fall back to a single repetition in that case. In the event that it isn’t actually doing so, you may want to try using the supported grammar declarations (basically, everything that doesn’t have optional repetitions since they blow up the possible grammar size enormously).
For an offline grammar that is actually pretty big – grammars have a much heavier overhead than statistical models so they do need to be smaller in order to perform. RuleORama specifically expects smaller grammars than you could get away with using the stock OpenEars grammar interface, which is a tradeoff in exchange for its faster recognition times.